People came from across the country to work in wartime Washington.Shortly thereafter, in a pattern repeated across the country, the city began losing residents attracted to newer housing in the suburbs, with commutes made easier by an expanded highway network outside the city.The populations of each place were counted separately from that of the City of Washington until Alexandria was returned to Virginia in 1846, and until the District of Columbia was formed into a single municipality in 1871. It is notable that Washington had a large African-American population even prior to the Civil War, and most were free people of color, not slaves.Due to slaveholders' manumission of slaves in the Upper South after the American Revolutionary War, the free black population in those states climbed markedly from an estimated 1% before the war to 10% by 1810. C., also known as the District of Columbia, reflect an ethnically diverse, cosmopolitan capital city. cities in that its founding was not organic, but rather established as a result of a political compromise. federal government in Washington has been instrumental in the city's later growth and development.In 2017, the District had a population of 693,972 people with a resident density of 11,367 people per square mile. The District had relatively few residents during much of its early history up until the Civil War. Its role as the capital leads people to forget that Washington has a native resident population.The Washington Metropolitan Area, which includes the surrounding counties in Maryland and Virginia, is the eighth-largest in the United States, with more than five million residents.
Washington has had a significant African-American population since the city's creation; several D. neighborhoods are well-noted for their contributions to black history and culture.
Washington's population continued to grow throughout the late nineteenth century as Irish-American, German-American and Jewish-American immigrant communities formed in the areas surrounding downtown.
By 1900, the city's growth had spread to the more residential sections beyond the old Florida Avenue boundary line following the development of the city's streetcar lines along major arteries such as Pennsylvania Avenue, SE, Connecticut Avenue, Wisconsin Avenue, Georgia Avenue, 14th Street and 16th Street.
In the postwar era, the percentage of African Americans in the city steadily increased as its total population declined as a result of suburbanization supported by federal highway construction, and white flight. Census, the city has added more than 120,000 residents and reversed a significant amount of the population losses seen in previous decades.
The black population included a strong middle and upper class. The District has experienced an increase in the proportion of white, Asian, and Hispanic residents, and a decline in the city's black population.